Drupal-Bibcite31<style face="normal" font="default" size="100%">Serum potassium and clinical outcomes in heart failure patients: results of risk calculations in 21 334 patients in the UK</style><style face="normal" font="default" size="100%">Serum potassium and clinical outcomes in heart failure patients: results of risk calculations in 21 334 patients in the UK</style>